Relacionamento Pré-Marital

Han Sang-hyun is a boy that dreams of becoming a manhwaka, and one day he hears a story that falls like lightning from a clear sky - he has a fiance he never knew about. After not being able to win against his grandfather he goes to the meeting against his will, however the lady he meets there is a girl who appears to be a rich spoiled girl named Yu Suh-eun. After having a fight with the girl who acts negatively to him, he comes back to his house to find that Yu Suh-eun is in his house!? What? The new house they'll be staying in is the "Marriage House".